van der Zee et al. 2012.

Data from the publication van der Zee R et al. 2012. Managed Honey Bee Colony Losses in Canada, China, Europe, Israel and Turkey, for the Winters of 2008–9 and 2009–10. Journal of Apicultural Research 51(1): 100–114. https://www.tandfonline.com/doi/full/10.3896/IBRA.1.51.1.12, accessed October 15, 2020.

More information on the COLOSS project here